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Delay-Doppler analysis of bistatically reflected signals from the ocean surface: theory and application / T. Elfouhaily in IEEE Transactions on geoscience and remote sensing, vol 40 n° 3 (March 2002)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 40 n° 3 (March 2002) . - pp 560 - 573 Titre : Delay-Doppler analysis of bistatically reflected signals from the ocean surface: theory and application Type de document : Article/Communication Auteurs : T. Elfouhaily, Auteur ; D.R. Thompson, Auteur ; L. Linstrom, Auteur Année de publication : 2002 Article en page(s) : pp 560 - 573 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] données Doppler [Termes IGN] mesurage d'effet Doppler [Termes IGN] réflexion (rayonnement) [Termes IGN] surface de la mer [Termes IGN] trajet multiple [Termes IGN] valeur efficace Résumé : (Auteur) We present a new stochastic theory for delay-Doppler mapping of the ocean surface for bistatic scattering. This stochastic theory should complement nicely the previous theories for the Global Positioning System (GPS) reflected signals from ocean surfaces, especially that of Zavorotny and Voronovich. We quantify the Doppler spread of the reflected signal before interpreting the delay. Our theoretical results compare very well to Doppler spectra computed using data collected during an airborne campaign. The bandwidth of the spectra is linked to the geometry and to the ocean roughness. The bulk of the Doppler spread is caused by the rms slope and not by the surface orbital velocity. Our stochastic theory is generalized to include the delay mapping made possible by the existence of the pseudorandom noise code on the GPS L-band carrier. These results can be seen as a generalization of Woodward's theorem for FM signals to delay-Doppler analysis of more complicated signals. Our formulation is amenable to inversion for the determination of geophysical parameters such as surface wind vector and mean sea level. Another novelty in our approach is the inclusion of the sea state. Numéro de notice : A2002-175 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.1000316 En ligne : https://doi.org/10.1109/TGRS.2002.1000316 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22090 [article]

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